Attachment for drill presses



- L. B. WESTPHAL ATTACHMENT FOR DRILL PRESSES Filed March 22 1922 2 Sheets-Shes NVENTOR.

1 7 ATTACHMENT FOR DRILL PRESSES Fild March 22 1922 v 2 Sheets-Sheet 2 Patented June 17, 1924.

LEROY B. WESTPHAL, 0F DAVENPORT, IOWA.

7 ATTACHMENT FOR DRILL PRESSES.

Application filed March 22, 1922. Serial No. 545,851.

(FILED UNDER THE ACT OF MARCH 3, 1883, 22 STAT. L., 625-.)

To all whom it may concern Be it known that l, LEROY B. "WESTPHAL, a citizen of the United States, and a resident of Davenport, county of Scott, and State of Iowa, have invented an Improvement in Attachments for Drill Presses, of which the following is a specification.

The invention described herein may be used by the Government, or any of its oflicers or employees in prosecution of work for the Government, or by any other person claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

A practical embodiment'of the invention is illustrated in the" accompanying drawings, wherein:

Fig. 1 is a fragmentary view in side elevation of the drill press equipped with attachments forming the subject of this invention;

Fig. 2 is an enlarged sectional hollow milling head; j

Fig. 3 is a section on the line 3-3 of Fig. 2; v

Fig. 4. shows end and side elevations of the guide plate for the milling head.

Fig. 5 is a plan View of the holding and feeding attachment;

Fig. 6 is a side elevation of the same;

Fig. 7 is a cross section on the line .77 of Fig. 5;

Fig. 8 is aplan view of the positioning stop and Fig. 9 is a side elevation of the same.

Referring to the drawings by numerals of reference:

View of the The usual form of drill press is shown at 10, provided with the feed bar 11 in which rotates the spindle 12 having the usual hollow end for the reception of the tapered shank 13 of the tool. 1

The tool illustrated consists of a hollow mill head 14, formed with an annular groove 15, preferably located at the junction of the shank and head, having communication with the interior of the head through ports or ducts 16. The groove and ducts serve to permit a cooling liquid such as soda water, to be fedto the cutting elements of the tool when the tool is in operation.

The head is provided with opposed tool receiving apertures 17 in which tool 18 may be mounted and held firmly in place, preferably by set screws 19. Slots 20 are formed in the head, by preference located at 90 from the tool apertures or sockets, to permit discharge of the cooling liquid and chips from the head under the action of centrifugal force. Positioned in the end of the head lt is a suitable guide plate 21 having a countersunk central aperture 22, whichplate serves to guide the tool into proper position upon the work.

For the purpose of holding the work and bringing articles of work in succession beneath the tool, I provide a work holder and carrier, preferably a circular member 23 formed with a reduced portion 24L'the periphery of which is provided with spaced apart notches 25 in which certain forms of work may be located. The notches herein shown are semi-circular in cross section to receive a prong of a'Martingale staple.

To provide for clamping the work in place upon the carrier, the reduced portion is drilled to receivebolts'27, oneof which is shown, each formed with a forked head 28 in which is pivoted a cam lever 29 adapted to be thrown to alternately release or clamp a plate 30 against the work and hold the same firmly in position in the notch.

In order that the work may be properly located with respect to the tool, recesses 31 are spaced apart about the periphery of the carrier, in which they are formed, and are adapted to receive the end of a pin 32, slidably mounted in an angle plate 33 and held and forced into the recesses, preferably by a resilient element 3% which is secured to the plate and contacts the head of the pin. The angle plate is adapted to be bolted to the table of the drill press.

In Fig. 5 is shown a spoke shoe 3'5 mounted on the carrier 23 to be'moved to position to be counter-sunk as indicated" at In this instance the bifurcated portion of the spoke shoe straddles the larger portion of the carrier 23, the thickness of such portion being designed to receive the shoe.

In practice the device is used in the following manner: in place, the Work to be operated on clamped in position in the carrier and the carrier pivotally mounted on the. table of the press. The operator then positions the carrier to bring one article of workfbeneath the tool, the pin 32 dropping into a recess3l to hold the carrier in such position, and starts the machine, bringing the tool down upon the Work in the usual Way. After the desired cut has been made the tool is raised and the carrier moved to the next position and the operation repeated,

An assistantmay be stationed by the, machine to reverse the, work. In the case of the Martingale staples he would, after one end had beenturned doWn, loosen the clamp, remove the, Work and reverse it and again clamp it; in place. This operationis performed While the cutting is proceeding so that the operator of, the machine continues cutting the. Work until all articles O Work are inthe desired condition. lf-claim;

1. An, attachment for drill P116 8951 bodying a pivotally mountedcircular Work carrying and supporting member, said member provided with recesses spaced apart about the, periphery thereof, an angle plate adjacent the periphery of said member, a pin slidable in the angle plate and adapted to successively enter, the recesses, 'a,resilient clement secured to the plateand' engaging the pin to force the pin into'the recesses, a

reduced portion formed on said member, the

reduced portion provided With grooves spaced, apart about the periphery thereof, cam levers secured to the reduced portion, and clamping platescconnected to the "reduced portionin position to be engaged by.

The cutting tool is secured the levers to -'clan1 -p the ork in place in the grooves.

'2. An attachment for drill presses, embodying a pivotal-1y mounted Work carrying and supporting member, said member provided with recesses spaced apart about the periphery thereof, an angle plate adjacent to the periphery of said member, a pin slidable in the angle plate and adapted to successively enter the recesses, a resilient element secured to the plate and engaging the pin to force the pininto the recesses, a reduced portion formed on the Work carrying membenprovided with grooves spaced apart about theperiphery thereof, clamping plates connected to the reduced portion in position to clamp Work in place in the grooves and means for forcing the clamping plates into clamping position.

An attachment for drill presses, embodying apivotallymounted Work carrying and supporting member, an angle plate adjacent to the periphery of said member, a pin carried by the plate for engagement With the member to hold the member in successive positions, resilient element urging the pin toward member engaging position, the mensber provided With grooves spaced apart about the periphery thereof, and means for clamping Work in position 1 aid g ov s,

4 1th attachment for drill presses, embodying a pivotally mounted Work carry ing and supporting member, resilient holding means engaging the member to hold the-same in successive positions, and clamp ing-meansspacedabout the periphery of the tenors. WEsrri-inn 

